Elizabeth Warren has aligned her views on healthcare with Joe Biden’s as she and other high-flying female Democrats joust in public to be his running mate.

The battle to be the vice-presidential candidate is typically conducted behind a veil of diffidence, with contenders expected to feign a lack of interest in the position.

This time, however, a series of Democrats have made their desire to be chosen public. Mrs Warren, who has already said she would accept the vice-presidency, this week sought to narrow her differences with the presumptive Democratic nominee on healthcare.

During her own presidential campaign, which she ended after March’s Super Tuesday without winning any states, Mrs Warren, 70, a senator from Massachusetts, attacked Mr Biden’s stance of maintaining and improving